netdev - [PATCH net-next 1/2] lwtunnel: set skb protocol and dev

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Date:	Mon, 3 Aug 2015 17:39:20 +0100
From:	Robert Shearman <rshearma@...cade.com>
To:	<davem@...emloft.net>
CC:	<netdev@...r.kernel.org>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Thomas Graf <tgraf@...g.ch>,
	Roopa Prabhu <roopa@...ulusnetworks.com>,
	"Robert Shearman" <rshearma@...cade.com>
Subject: [PATCH net-next 1/2] lwtunnel: set skb protocol and dev

In the locally-generated packet path skb->protocol may not be set and
this is required for the lwtunnel encap in order to get the lwtstate.

This would otherwise have been set by ip_output or ip6_output so set
skb->protocol prior to calling the lwtunnel encap
function. Additionally set skb->dev in case it is needed further down
the transmit path.

Signed-off-by: Robert Shearman <rshearma@...cade.com>
---
 net/core/lwtunnel.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c
index c240c895b319..5d6d8e3d450a 100644
--- a/net/core/lwtunnel.c
+++ b/net/core/lwtunnel.c
@@ -215,8 +215,12 @@ int lwtunnel_output6(struct sock *sk, struct sk_buff *skb)
 	struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
 	struct lwtunnel_state *lwtstate = NULL;
 
-	if (rt)
+	if (rt) {
 		lwtstate = rt->rt6i_lwtstate;
+		skb->dev = rt->dst.dev;
+	}
+
+	skb->protocol = htons(ETH_P_IPV6);
 
 	return __lwtunnel_output(sk, skb, lwtstate);
 }
@@ -227,8 +231,12 @@ int lwtunnel_output(struct sock *sk, struct sk_buff *skb)
 	struct rtable *rt = (struct rtable *)skb_dst(skb);
 	struct lwtunnel_state *lwtstate = NULL;
 
-	if (rt)
+	if (rt) {
 		lwtstate = rt->rt_lwtstate;
+		skb->dev = rt->dst.dev;
+	}
+
+	skb->protocol = htons(ETH_P_IP);
 
 	return __lwtunnel_output(sk, skb, lwtstate);
 }
-- 
2.1.4

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